Radio Access Technology Capability Signaling Optimization
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Solution Overview
Problem
Existing wireless communication systems face excessive overhead signaling when UE radio capabilities are signaled to a BS, particularly for NB-IoT RATS, which have limited bitrate, and legacy UEs that do not support radio capability signaling optimization.
Innovation Solution
A method where a UE determines whether it supports RACS optimization for a specific RAT and transmits a UE radio capability identifier only when necessary, allowing the BS to determine network capabilities based on received identifiers, thereby reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a UE transmits complete radio capability information to a BS, then the BS can accurately determine network capabilities, but signaling overhead increases excessively
Solution Approach 1:
The patent extracts only the essential radio capability information needed for network operation into a compact identifier format. Instead of transmitting complete radio capability datasets, the system transmits a condensed radio capability identifier that references pre-defined capability sets, thereby extracting only the necessary information while eliminating redundant data transmission.
Solution Approach 2:
The patent transforms radio capability information from a detailed parameter set into a simplified identifier parameter. By changing the representation format from comprehensive capability descriptions to compact identifiers, the system maintains the essential information while dramatically reducing the signaling overhead required for transmission.
2Loss of information
If a UE transmits radio capability identifiers for all supported RATs, then the BS can determine all network capabilities, but network traffic increases for NB-IoT with limited bitrate
Solution Approach 1:
The patent segments radio capability information by RAT type, allowing the UE to transmit identifiers only for the specific RAT it is currently accessing. Instead of transmitting a single comprehensive identifier covering all RATs, the system divides capability information into RAT-specific segments and transmits only the relevant segment, reducing network traffic for NB-IoT while preserving necessary capability information.
Solution Approach 2:
The patent applies partial action by transmitting only the portion of radio capability information that is necessary for the current RAT connection. The UE transmits radio capability identifiers selectively based on the target RAT, providing exactly the amount of information needed without excessive transmission of unrelated capability data for other RATs.
3Loss of information
If a legacy UE that does not support RACS optimization transmits capability information, then the BS can determine capabilities, but signaling overhead cannot be reduced
Solution Approach 1:
The patent creates a universal signaling mechanism that serves both legacy UEs and RACS-optimized UEs. The radio capability identifier framework is designed to be universally applicable, allowing legacy UEs to transmit traditional capability information while RACS-optimized UEs transmit condensed identifiers. The BS is configured to handle both formats, providing multi-functionality that maintains compatibility across different UE types while enabling overhead reduction for optimized devices.
Solution Approach 2:
The patent introduces an intermediary layer in the form of radio capability identifiers that mediate between detailed capability information and compact signaling requirements. This intermediary representation allows legacy UEs to communicate through traditional means while RACS-optimized UEs can use the condensed identifier format, with the BS acting as the mediator that interprets both formats appropriately.
Data Source
AI summary
A method, an apparatus, and/or a computer program product for wireless communication are provided. Radio capability signaling (RACS) optimization for the radio access technology (RAT) may be deployed for some user equipments (UEs) in a network to reduce a signaling overhead associated with identifying UE radio capabilities. The UEs may be configured with a set of UE radio capability identifiers, such as a UE radio capability identifier for a narrowband (NB) RAT, a UE radio capability identifier for a non-NB RAT, and/or the like. A UE may provide a single UE radio capability identifier corresponding to a type of RAT to which the UE is to connect. The BS may determine that the UE supports RACS optimization for the RAT. If the UE does not provide the UE radio capability identifier, the BS may infer that the UE does not support RACS optimization.